Hey Guys thanks for the replies, they are greatly appreciated!
Regarding engine noise / rpm effect there is none, dead silent!
I'm almost thinking there is a grounding issue with the stock MACH 460 amps. The crackle is very loud btw!
I will be running a by-pass: head unit to speakers direct just to rule out the head unit! Just because it is new, doesn't mean it doesn't have issues!
If that works fine, I will move on to the individual amps.
Worst case scenario I will run all new wiring and connections, IF the amps turn out okay!
Like everything else with this car, there will be a bit of a challenge!! Like I don't have anything else to do!!!!
1994 GT 5.0 All Black in and out